Mitsubishi Electric FR-A8NC Instruction Manual page 57

Device no. Signal
RY9 Output stop

Start self-holding selection
RYA
(terminal STOP function)
RYB Reset (RES terminal function)
RYC Monitor command
Frequency setting command /
RYD

torque command (RAM)
Frequency setting command /
RYE torque command

(RAM, EEPROM)
RYF Instruction code execution request

RY1A Error reset request flag

Signal names are initial values. Using Pr.180 to Pr.186, Pr.188, and Pr.189, you can change input signal functions.
Note that some of signals do not accept a command from the network according to the Pr.338 and Pr.339 settings.
Refer to the Instruction Manual (Detailed) of the inverter for details of Pr.180 to Pr.186, Pr.188, Pr.189, Pr.338, and Pr.339.

The signals are fixed. They cannot be changed using parameters.

While "1" is set in the frequency setting command (RYD), the set frequency (RWw1) is always applied.

If "1" is set in these registers at the same time while Pr.544 = "0," only one of these is executed.

Refer to page 35
56
DETAILS OF INPUT AND OUTPUT SIGNALS
Turn on the MRS signal to stop the inverter output. (The logic can be changed by the
Pr.17 setting.)

Functions assigned to terminal STOP and RES are activated.

When "1" is set in the monitor command (RYC), the monitored value is set in the remote
register RWr0, 1, 4 to 7, and "1" is set in the monitoring (RXC). While "1" is set in the
monitor command (RYC), the monitored data is always updated.
When "1" is set in the frequency setting command/torque command (RYD), the set
frequency/torque command (RWw1) is written to RAM of the inverter.
After the writing completes, "1" is set in the frequency setting (torque command)
completion (RXD). Torque command is written to the inverter RAM at the same time
during torque control under Real sensorless vector control or vector control.
When "1" is set in the frequency setting command/torque command (RYE), the set
frequency/torque command (RWw1) is written to RAM and EEPROM of the inverter. After
the writing completes, "1" is set in the frequency setting (torque command) completion
(RXE).
Torque command is written to RAM and EEPROM of the inverter at the same time during
torque control under Real sensorless vector control or vector control.
To change the frequency consecutively, be sure to write data to the inverter RAM.
When "1" is set in the instruction code execution request (RYF), processes corresponding
to the instruction codes set to RWw2, 10, 12, 14, 16 and18 are executed. "1" is set in the
instruction code execution request (RXF) after completion of instruction codes. When an
instruction code execution error occurs, a value other than "0" is set in the reply code
(RWr2, 10, 12, 14, 16, 18).
When "1" is set in the error reset request flag (RY1A) at an inverter fault, the inverter is
reset, then "0" is set in the error status flag (RX1A).
for operation conditions of inverter reset.
Description

